body{
	background: url("../img/bg.jpg");
	background-size: 100% 1080px;
	background-repeat: no-repeat;
	background-attachment: fixed;
	height: 100vh;
}
h1{
	font-size: 100px;
	font-family: "华文彩云";
	opacity: .7;
}
.熊{
	width: 400px;
	height: 400px;
	border: 1px solid red;
	background: url(../img/bear_1.png) no-repeat;
	background-size: 100% 100%;
	position: relative;
	left: -60px;
	top:-71px;
	animation: bear 10s linear infinite;
}
@keyframes bear{
	0%{
		background: url(../img/bear_1.png);
		background-size: 100% 100%;
		}
	10%{
		background: url(../img/bear_2.png);
		background-size: 100% 100%;
		top: 100px;
		left: 200px;
		}
	20%{
		background: url(../img/bear_3.png);
		background-size: 100% 100%;
		top: 150px;
		left: 100px;
		}
	30%{
		background: url(../img/bear_4.png);
		background-size: 100% 100%;
		top: 200px;
		left: 400px;
		}
	40%{
		background: url(../img/bear_5.png);
		background-size: 100% 100%;
		top: 200px;
		left: -200px;
		}
	50%{
		background: url(../img/bear_6.png);
		background-size: 100% 100%;
		top: 300px;
		left: 600px;
		}
	60%{
		background: url(../img/bear_7.png);
		background-size: 100% 100%;
		top: 500px;
		left: 400px;
		}
	70%{
		background: url(../img/bear_8.png);
		background-size: 100% 100%;
		top: 300px;
		left: 400px;
		}
	80%{
		background: url(../img/bear_9.png);
		background-size: 100% 100%;
		top: -200px;
		left: 500px;
		}
	90%{
		background: url(../img/bear_10.png);
		background-size: 100% 100%;
		top: 0px;
		left: 550px;
		}
	100%{
		background: url(../img/bear_1.png);
		background-size: 100% 100%;
		top: -60px;
		left: -71px;
		}
	
}